[Enhance] Add SQLite option to settings + documentation

[TreyWW]

Before you add this enhance issue, please check all of the issues in this project to ensure it doesn't already exist

I believe SQLite should be added for easier support for new users / users that dont have a local database running

What areas does this enhancement come under?

• Backend settings
• Documentation Updates or Github Content

Some tips

• You'll need "django.db.backends.sqlite3"
• Probably need "BASE_DIR" and "db.sqlite3"

[TreyWW]

Turns out this was already pretty much added. Just needed to add documentation for it